Science energy Flashcards
What is the ….?…. For total energy before transfer=total energy after?
Energy in = energy out
Can energy be destroyed or created?
No it can only change from one state to another.
What are the methods of heat transfer?
1) conduction - solids
2) convection - liquids and gasses only
All particles
3) radiation - travel as waves.
What are the 4 states of matter?
1) solid
2) liquid
3) gas
4) plasma
Dose hot air leave or dose cold air arrive?
Heat leaves
When heat is transferred through a solid the molecules do what?
They vibrate.
Are all metals good at conducting heat yes or no?
Yes they are all good conductors of heat.
List 5 insulators
Asbestos Fibreglass Styrofoam Most woods Cotton when dry
What do many insulators contain pockets of?
Air
What is a convection current shown by?
The purple dye in the water
What direction dose the water go above the heat source and why?
It goes up because it is not as denies as the cold water.
